Botanical Name: Ageratum houstonianum ‘Aloha White’ 

Common Name: Floss Flower 

Hardiness Zone: Grown as an Annual in Most Climates (USDA Zones 2–11) 

Size: 10–14" Tall × 12–16" Wide 

Growth Habit: Compact, Mounded, Well-Branched Habit 

Sunlight: Full Sun to Partial Sun 

Soil: Well-Drained, Moderately Fertile Soil 

Water Needs: Moderate; Even Moisture for Best Performance

Bloom Season: Late Spring Through Frost 

Fertilizer: Light, Regular Feeding During the Growing Season

Features: Soft Blue Blooms, Dense Flowering, Excellent Uniformity, Pollinator Friendly 

Uses: Ideal for Borders, Edging, Containers, Window Boxes, and Mass Plantings 

Patent: ✔ Patented 

Propagation: ❌ Propagation Prohibited Without License

See our complete Ageratum Plant Guide for full care details.

More About Ageratum Aloha White

Aloha White has a very different role in the garden than its blue counterparts, even though the growth habit is nearly identical. Where Aloha Blue settles things down, Aloha White brightens them up. It stays just as compact and well-mannered, forming tidy, rounded plants that never stretch or sprawl, but the effect in the landscape is brighter and more defined. The white blooms sit cleanly above the foliage and read crisp from a distance, especially in full sun. They don’t blur or dull as the season goes on, which is something I watch closely with white-flowering plants. 

Even during the hottest part of summer, Aloha White keeps its color true and its structure intact, which makes it incredibly useful near walkways, entrances, and container edges where you want things to look intentional and sharp. Like the rest of the series, it blooms steadily from mid Spring through frost, but the white flowers give it a slightly stronger presence, especially when paired with dark foliage or saturated colors. I’ve found it works especially well when you need separation—between bold annuals, along hardscape, or in mixed containers where everything else is doing a lot visually.

Why We Like It (Our Trials)

In our trials, Aloha White showed the same strengths as others in the Aloha Series; dense foliage, even flowering, and excellent performance through heat and humidity, but with a noticeably brighter role in the landscape. The plants stayed compact without opening up in the center and never needed corrective trimming to maintain their shape.

We ran it under the same conditions: regular watering, light feeding, and no special treatment. It held together beautifully, which tells me it’s a reliable choice for real gardens, not just ideal ones. What I appreciate most about Aloha White is how purposeful it feels. It defines edges, highlights nearby plants, and adds light where darker colors can feel heavy. When I need a Ageratum that brings structure and brightness without becoming harsh or flashy, this is the one I use.

Aloha White vs. Other Ageratums

For gardeners looking for a classic, compact Ageratum with modern performance and season-long color, Aloha® White remains one of the best choices available. For an identical option with blue flowers, check out Aloha Blue.

Compared to taller varieties like ‘Blue Horizon, or pollinator-focused selections such as Monarch Magic™, Aloha® White stays much lower and more compact. While those varieties provide height and large flower heads for mid-border use, Aloha® White excels at precision planting, offering dense blooms and tidy form where structure and control are key.